\documentclass{standalone}
\usepackage{tikz}
\usepackage{ctex,siunitx}
\setCJKmainfont{Noto Serif CJK SC}
\usepackage{tkz-euclide}
\usepackage{amsmath}
\usepackage{wasysym}
\usepackage{circuitikz}
\usetikzlibrary{patterns, calc}
\usetikzlibrary {decorations.pathmorphing, decorations.pathreplacing, decorations.shapes,}
\begin{document}
\small
\begin{circuitikz}[>=latex, yscale=0.7]
  % \useasboundingbox(0.9,0)rectangle(5.1,5);
  \draw (0,0) to [cute open switch] (3,0)--(6,0);
  \draw (6,4)--(0,4) to [battery2] (0,0);
  \foreach \x in {.5,1.25,...,6}
  \foreach \y in {.5,1.25,...,3.5}
  {
     \node at (\x, \y) {$\times$};
  }
  \node at (1.5,-.2){$K$};
  \draw[very thick] (4,0)node[below]{$B$}--(4,4)node[above]{$A$};
  \draw[very thick] (4,0) arc (0:-180:0.1);
  \draw[very thick] (4,4) arc (0:180:0.1);
  \draw[->] (4,2.3)--(4.8,2.3)node[above]{$F$};
\end{circuitikz}
\end{document}